Pure Physics Nov 2016_TYS ANSWERS

Nov 2016_Suggested ANSWERS_as at 1 Jan 2019 Page 1 of 6 – Nov 2016 Catholic High School | O-Level Physics NOT IN SYLLABUS: 5059 Nov 2016 P1: - Suggested Answers P2: - Paper 1 [40 marks] 1 C 11 B 21 B 31 D 2 D 12 A 22 C 32 D 3 C 13 B 23 D 33 D 4 C 14 C 24 A 34 C 5 A 15 C 25 B 35 B 6 A 16 B 26 A 36 D 7 C 17 A 27 D 37 A 8 B 18 D 28 B 38 D 9 B 19 A 29 C 39 B 10 C 20 D 30 C 40 C *Q. 1: C (B is incorrect.) *Q. 8: B The distribution of material within the bottle ensured that the centre of mass is originally at point Y. However, the extra sand sinks to a level that is above the original position of the centre of mass and so the centre of mass rises. (C is incorrect.) *Q. 13: B A question that concerns kinetic energy does not always require the answer obtained to be squared. (D is incorrect.) *Q. 32: D Option B: The resistance of the ammeter was not equal to that of the lamps. Option C: There should be less current in the branch with the greater resistance. (B and C are incorrect.) *Q. 36: D The compass needle is needed to retain its magnetised state in order to reveal the direction of the magnetic field. (C is incorrect.) *Q. 37: A The coil reaches equilibrium in a vertical position. (B is incorrect.) *Q. 39: B Although a transformer requires an alternating supply, the a.c. is not converted to d.c. at any stage. (C is incorrect.) *Q. 40: C The current in Y does not decrease in order for the power supplied to stay the same. (D is incorrect.) Nov 2016_Suggested ANSWERS_as at 1 Jan 2019 Page 2 of 6 – Nov 2016 Paper 2 [80 marks] 1 a 10 m s-2, downwards 10 m s-2, downwards 1 1 b 2 ci The displacement-time graph is a curve, which shows that the velocity (gradient of the displacement-time graph) is changing. 1 cii Velocity: constant Acceleration: zero 1 2 a 2 bi a = ௩ ି ௨ ௧ = ଵ.ହ ି ଴ ଴.ହ଴ = 3.00 m s-2 FR = ma = (60)(3.00) = 180 N (3 s.f.) 1 1 bii Area, A = 500 cm2 = 0.0500 m2 W = mg = (60)(10) = 600 N P = ி ஺ = ଺଴଴ ଴.଴ହ଴଴ = 12 000 Pa (3 s.f.) 1 1 biii The force exerted by the man on the ground increases to be larger than his weight (so that there is a resultant force acting on himself upwards). 1 3 a Work is the product of the force applied and the distance moved in the direction of the force. 1 bi Density,  = ௠ ௏ m = V = (1000)(200) = 200 000 kg W = mg = (200 000)(10) = 2 000 000 N Work done = (F)(s) = (2 000 000)(4.0) = 8 000 000 = 8.00  106 J (3 s.f.) 1 1 Note: Velocity is zero at t = 0.4 s weight weight normal reaction force

Nov 2016_Suggested ANSWERS_as at 1 Jan 2019 Page 3 of 6 – Nov 2016 bii P = Work done Time = ଼.଴ × ଵ଴ల 5.0 = 1.6  106 W (3 s.f.) 1 1 c Some of the input power may be lost as thermal and sound energies (due to friction in the pump). 1 4 a Condensation is a change in state of a substance from gaseous to liquid state, without a change in temperature.